Terminal methyl as a one-carbon synthon: synthesis of quinoxaline derivatives<i>via</i>radical-type transformation
作者:Xinfeng Wang、Huanhuan Liu、Caixia Xie、Feiyu Zhou、Chen Ma
DOI:10.1039/c9nj04910j
日期:——
pyrrolo[1,2-a]quinoxaline derivatives has been developed. Ferric chloride served as a promoter and as a Lewis acid in the reaction. Solvents provided the corresponding carbon sources simultaneously. The majority of solvents with terminal methyl groups, including ethers, amines and dimethyl sulfoxide, were reactive in the synthesis of quinoxaline derivatives at a certain yield via C–H(sp3) amination/C–O
已经开发了铁促进的吡咯并[1,2- a ]喹喔啉衍生物的构建方法。氯化铁在反应中用作促进剂和路易斯酸。溶剂同时提供了相应的碳源。大多数带有末端甲基的溶剂,包括醚,胺和二甲基亚砜,在通过C–H(sp 3)胺化/ C–O或C–N(C–S )分裂。该方法适用于多种吡咯并[1,2- a ]喹喔啉和吲哚并[1,2- a ]喹唑啉底物。
Copper-Catalyzed Synthesis of Alkyl-Substituted Pyrrolo[1,2-a]quinoxalines from 2-(1H-Pyrrol-1-yl)anilines and Alkylboronic Acids
作者:Rulong Yan、Xin Guan
DOI:10.1055/s-0037-1610743
日期:2020.3
A radical pathway for the construction of pyrrolo[1,2-a]quinoxalines by using 2-(1H-pyrrol-1-yl)anilines and alkylboronic acids has been developed. Features of this process include Cu catalysis, readily accessible starting materials, and simple operations. Alkylboronic acids are used for the construction of pyrrolo[1,2-a]quinoxaline derivatives, and the desired products are obtained in moderate yields
Copper-catalyzed tandem aerobic oxidative cyclization for the synthesis of 4-cyanoalkylpyrrolo[1,2-<i>a</i>]quinoxalines from 1-(2-aminophenyl)pyrroles and cyclobutanone oxime esters
作者:Zhenyu An、Yong Jiang、Xin Guan、Rulong Yan
DOI:10.1039/c8cc06256k
日期:——
A copper-catalyzed tandem ring-opening/cyclization reaction for the synthesis of 4-cyanoalkylpyrrolo[1,2-a]quinoxalines from 1-(2-aminophenyl)pyrroles and cyclobutanone oxime esters has been developed. This reaction involves C–C bond cleavage and C–C and C–N bond constructions with good functional group tolerance. A wide range of products are obtained in moderate to good yields under mild conditions
已开发了一种铜催化串联开环/环化反应,用于由1-(2-氨基苯基)吡咯和环丁酮肟酯合成4-氰基烷基吡咯并[1,2- a ]喹喔啉。该反应涉及C–C键断裂以及具有良好官能团耐受性的C–C和C–N键结构。在温和的条件下,可以以中等到良好的产率获得各种各样的产品。
FeCl<sub>3</sub>-Catalyzed synthesis of pyrrolo[1,2-a]quinoxaline derivatives from 1-(2-aminophenyl)pyrroles through annulation and cleavage of cyclic ethers
作者:Zhenyu An、Lianbiao Zhao、Mingzhong Wu、Jixiang Ni、Zhenjie Qi、Guiqin Yu、Rulong Yan
DOI:10.1039/c7cc07089f
日期:——
1-(2-aminophenyl)pyrroles and cyclic ethers, which includes functionalization of C(sp3)-H bonds and the construction of C–C and C–N bonds, has been developed. The features of this reaction are Fe catalysis, low-cost and readily accessible starting materials. Moreover, this procedure exhibits good functional group tolerance and a series of pyrrolo[1,2-a]quinoxaline derivatives are obtained in moderate to good
一种直接的铁催化从1-(2-氨基苯基)吡咯和环醚合成吡咯并[1,2- a ]喹喔啉的方法,包括C(sp 3)-H键的官能化和C–的构建已经开发了C和C–N键。该反应的特征是铁催化,低成本和易于获得的起始原料。此外,该方法表现出良好的官能团耐受性,并且以中等至良好的产率获得了一系列吡咯并[1,2- a ]喹喔啉衍生物。
Application of α-amino acids for the transition-metal-free synthesis of pyrrolo[1,2-a]quinoxalines
作者:Huanhuan Liu、Feiyu Zhou、Wen Luo、Yuxin Chen、Chenyang Zhang、Chen Ma
DOI:10.1039/c7ob01688c
日期:——
A practical and concise protocol for the efficient synthesis of pyrrolo[1,2-a]quinoxalines from readily available α-amino acids and 2-(1H-pyrrol-1-yl)anilines under transition metal-free conditions has been established. This protocol, which includes the formation of new C–C and C–N bonds, features a wide substrate scope with a broad range of functional group tolerance.
建立了一种实用且简洁的方案,可在无过渡金属的条件下从容易获得的α-氨基酸和2-(1 H-吡咯-1-基)苯胺有效合成吡咯并[1,2- a ]喹喔啉。该协议包括新的C–C和C–N键的形成,具有广泛的底物范围和广泛的官能团耐受性。